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package org.apache.impala.catalog;

/**
 * Compatibility rules are separate operations to compose a compatibility matrix. Matrices
 * start with empty values, and rules fill them by applying the rules defined in the
 * implementations.
 * <p>
 * Example: 'DiagonalCompatibility' sets the matrix's main diagonal equal to the
 * corresponding row and column values.
 */
public interface CompatibilityRule { void apply(PrimitiveType[][] matrix); }
